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Earnings Per Common Share (Tables)
 6 Months Ended
Jun. 30, 2018
Earnings Per Share [Abstract]  
Reconciliation of Earnings Per Common Share
The following is a reconciliation of the numerators and denominators of the basic and diluted earnings per common share computations for the six months and three months ended June 30, 2018 and 2017 (in millions, except per share amounts):
 
Six Months Ended 
 June 30,
 
Three Months Ended June 30,
2018
 
2017
 
2018
 
2017
Basic:
 
 
 
 
 
 
 
Net income attributable to Intercontinental Exchange, Inc.
$
919

 
$
922

 
$
455

 
$
419

Weighted average common shares outstanding
580

 
593

 
578

 
591

Basic earnings per common share
$
1.59

 
$
1.56

 
$
0.79

 
$
0.71

Diluted:
 
 
 
 
 
 
 
Weighted average common shares outstanding
580

 
593

 
578

 
591

Effect of dilutive securities - stock options and restricted shares
3

 
4

 
3

 
4

Diluted weighted average common shares outstanding
583

 
597

 
581

 
595

Diluted earnings per common share
$
1.58

 
$
1.55

 
$
0.78

 
$
0.71